The other day I was booking it on my atv and my front right wheel locked up, I thought it may be a wheel bearing but when I took the wheel off the next day everything spun fine and I took it for a spin - no issues. Now when I put it in 4x4 while jacked up only 3 wheels spin not the front right. Any ideas?

I have a 93 350L so I imagine the 4 x 4 works the same, so If you are getting power to one of the front wheels and not the other, it is most probably one of two things. The 4 x 4 system engages with electomagnetic plates in the hub so if you broke the plate that will cause you problem or, if the electromagnet that energizes that plate fails that will also do that. To check it, remove wheel, then the brake caliper, then gently pry out the cap that holds in the hub oil and drain. I can't remember the size socket you need and what you have may be different than mine, but whatever it is, carefully take the hub off being careful not to disturb the cage inside. The plate in question is a flat piece of metal with tabs on it. when you turn the key on and engage the 4 x 4 that plate should stick to the suface it mates up to enough so that it will be hard to remove it with just your fingers. So, if the plate looks OK, but does not magnetize and stick you probably need to replace the electromagnet.
I really hope what you have in your 4 x 4 system is the same as mine so I have't led you on a wild goose chase, but I hope it helps! There is a member here who can provide you with a PDF of the Polaris shop manual which is a huge help with pictures and exploded views.